Question about 1998 GMC Safari

1 Answer

1998 Safari fuel pump magic wire to power fuel pump

I read online that there is a wire to bypass the normal fuel pump wiring, fuse and relay. So I went to look under the hood to find said magic wire to see if my fuel pump is dead or something else is the issue. Well all I can find is the two wires that connect to the fuse block that say Aux A and Aux B..... am I missing something or is one of these it? Is this wire I am looking for only in the cargo van and not passenger or does it not exist at all? I read it was a 12 guage red wire with eyelet crimped on the end not hooked up to anything....

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • GMC Master
  • 34,153 Answers

In the underhood fuse/relay center, there is a red wire identified as the fuel pump prime connector on the fuel pump relay. That may be what you are looking for

Posted on Dec 08, 2012

  • Awesome Andrew Dec 08, 2012

    Sounds like that could be what I am looking for, but I do not see it identified on my vehicle? Are you looking at a wiring diagram or ???

×

3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 84 Answers

SOURCE: hot wire to the fuel pump stays on after the the

Check and see if the fuel pump relay is stuck.

Posted on Feb 12, 2010

  • 1403 Answers

SOURCE: Fuel pump does not work,

under the hood in the black main relay and fuse box.look for fuel pump relay.the relays most likely bad. or a loose wire to the fuel pump.has it been wrecked? have to ask yourself alot of questions when you bypass the pump straight to battery and it works. start with simplelest 1st. check main fuse relay and fuse panel 1st.then go to wiring harness that goes to the pump. thank you for choosing fixya.com.

Posted on Apr 14, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Could I run a electric fuel pump on my 1998 Cadillac deville?


if it did not have an electric fuel before then the installation of an electric pump is a relatively easy process. If you have an electric pump already fitted but it has failed then remove it and install the new pump in its place. Take care to check all wires, fuses and relays and any pressure sensors for correct operation. Remove and blank of the opening for any mechanical pump on the engine
For new installation select an easily accessible place under the vehicle that can be protected from flying rocks and road debris. Run a power wire (red colour) from the run side of the ignition switch to the relay ( to be fitted ) near the battery or in the engine bay. Run this wire through an inline fuse close to the ignition switch to protect the circuit. attach to a coil actuation terminal of the relay.( look at the base of the relay for terminal identification. Run a black wire from the other side of the coil actuation pin on the relay to earth. Normally the same bolt that mounts the relay. Run a red wire capable of carrying 20 amps directly from the battery terminal through an inline fuse ( close to the terminal) to a power pin on the relay. Run another red wire from the outlet power pin on the relay to the electric pump. . Run an earth wire from the pump to earth.
This is a basic electric circuit for the installation of the pump. If there is a requirement for a pressure regulator or pressure sensor to control the pressure or pump operation , that control wire will be connected in series into the wire from the ignition switch so that when the pressure is reached then it breaks the circuit to the relay from the ign. switch and the pump will stop operation until the circuit is again completed. When the ignition switch is off there will be no power for the pump

Oct 09, 2014 | 1998 Cadillac DeVille

1 Answer

I need a gmc safari diagram for fuel pump 1991


I don't usually do diagrams due to copyright laws.
From the fuel pump you have a gray wire and a black wire.
The black is ground and the gray is power from both the pump relay and the oil pressure switch.
The oil pressure switch provides power to the pump once the engine starts.
At the relay, you have a green and white wire that provides power from the ECM with the key switch on. You have an orange wire that provides power from a 15amp fuse.
The gray wire going to the pump, and a black and white wire for ground for the relay.
The ECM provides power for 3 seconds when the key switch is turned on to boost line pressure for startup.

Jan 30, 2013 | 1997 GMC Safari

1 Answer

Injector not working why put new injector new computer new fuel pump does it have injector relay 1987 celebrity


Check fuel pressure. Have you replaced the fuel filter on schedule? Verify that the fuel pump is getting power. Power goes through an in-line fuse, then the fuel pump relay or the oil pressure sensor. (The relay bypasses the oil pressure sensor while the engine starts, but fuel pump power goes through the sensor during normal run operation. If you lose oil pressure, the fuel pump is shut off to protect the engine.) On four-cylinder models, the fuse is in the fuse block (E PUMP 10)
The fuel injectors are connected to the ECM fuse on one side and straight to the engine computer on the other side. Check the connectors and wiring, especially at the injector.

Aug 26, 2011 | 1987 Chevrolet Celebrity

1 Answer

I need the fuel system diagram for a 1998 Chevy Tahoe w/ 5.7L gasoline engine


Dark green provides power to fuel pump relay from the ECU. Orange wire at fuel pump relay is power at all time and is provide from the ECM/Bat Fuse at fuse block (Left side of dash). It also connects to the fuel pump oil pressure switch. The grey wire at relay provides power to the fuel pump and fuel pum oil pressure switch. The red plug thats tape to harness from relay/fuse center is the prime connector..

Jun 11, 2010 | 1998 Chevrolet Tahoe

1 Answer

93 gmc sierra 5.7 liter engine, injection carb, will turn over won't start, replaced fuel pump fuse, replaced fuel pump relay, replaced fuel pump inside gas tank, no gas flow to carb , gas gauge has always...


you say you replaced the fuse, but does the fuse have power? the gray wire at pump should have power when cranking, or for 2 seconds when turning key on. At fuel pump relay, put power onto gray wire, the pump should run if the wiring is good. if it doenst run then ck for power at fuse while power is on gray wire.

Oct 19, 2009 | 1995 GMC Sierra C1500

1 Answer

95 fuel pump replaced twice still fails,works


you may want to check on the wiring. also test on the pumps if they go bad after replacement by bypassing the relays and connecting it to the battery. Either way it may still be the wiring. The bad wires or connection and even relay may send intermittent power to the pump. IT could also have fried your pump should it not work when directly connected.

Jul 07, 2009 | Saab 9 5 Cars & Trucks

2 Answers

I have a 1986 lincoln towncar i replaced the fuel pump and i could hear the fuel pump running, then i found i had reversed the pump wires, after changing them the fuel pump won't start . i'v tried revesing...


Hope you can read it, the load side of relay gets voltage from fusible link. The load side of relay is that line with arrowhead, showing open switch on left side of relay in diagram.
tc fuel pump-ohlkxbbl2ityxkipumpfkvzd-4-0.jpg

Jul 06, 2017 | 1986 Lincoln Town Car

1 Answer

2000 S10 4.3L Fuel pump stopped working out of the blue. We Put a new Fuel Pump in, new harnes to fuel pump, new fuel filter, new relay, new fuses in IGN C and ECM B fuses. Still the pump will not turn on....


Did you verify that the relay terminals have the appropriate signals to them? 

ECM fuse B (20-amp) should provide power at all times to the orange wire of the fuel pump relay. The relay coil receives ground via the black wire, and relay coil gets power from the dark green/white wire. When the relay is closed, you should have battery power on the gray wire. 

The relay trigger wire should have power from the dark green/white wire in terminal 1 of the Vehicle Control Module (VCM) connector for the first couple of seconds after they key is turned to run (to prime the system) and when the truck is running. Checking for all the appropriate signals at the relay is where I would start. That is after I checked for diagnostic codes.

Believe the fuel relay is the middle relay out of the three in the left rear of the glove box. Last thing is to hot wire the fuel pump if you can not get it scanned, see if the pump is bad unless your going to have a shop work on changing the fuel pump.
Good luck and hope this helps. keep me posted.

May 06, 2009 | 1999 GMC Safari

1 Answer

No power to fule pump relay is ok gray wire hase no power canot


hi ted , the grey wire at the fuel pump goes to the fuel pump relay , and the relay gets its power from the ECM B fuse 20 amps , located in the underhood fuse relay center , when you tested for power , how did you do the test ? a test light at the grey wire while someone was cranking the motor ? i'm looking for a fix ya vote , so if finding your fuse doesn't solve your problem comment back before voting and i will help you , thanks .

Jan 11, 2009 | 1999 GMC Safari

Not finding what you are looking for?
1998 GMC Safari Logo

Related Topics:

145 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...